Tech YouTuber Marques Brownlee and peers observed Samsung phones' batteries swelling faster than other brands since 2022, highlighting increased dangers even in unused devices.
Swelling occurs as battery electrolytes evaporate, producing gases like carbon dioxide and hydrogen that increase internal pressure and can lead to explosions, even if the phone is powered off.
Experts recommend storing old phones at 50% charge in cool, dry places and recycling swollen batteries properly to prevent fires, following Environmental Protection Agency guidelines for hazardous waste disposal.
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